Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * dir.c | |
3 | * | |
4 | * Copyright (C) 1995, 1996 by Volker Lendecke | |
5 | * Modified for big endian by J.F. Chadima and David S. Miller | |
6 | * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache | |
7 | * Modified 1998, 1999 Wolfram Pienkoss for NLS | |
8 | * Modified 1999 Wolfram Pienkoss for directory caching | |
9 | * Modified 2000 Ben Harris, University of Cambridge for NFS NS meta-info | |
10 | * | |
11 | */ | |
12 | ||
1da177e4 LT |
13 | |
14 | #include <linux/time.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/stat.h> | |
17 | #include <linux/kernel.h> | |
1da177e4 LT |
18 | #include <linux/vmalloc.h> |
19 | #include <linux/mm.h> | |
20 | #include <asm/uaccess.h> | |
21 | #include <asm/byteorder.h> | |
1da177e4 LT |
22 | |
23 | #include <linux/ncp_fs.h> | |
24 | ||
25 | #include "ncplib_kernel.h" | |
26 | ||
27 | static void ncp_read_volume_list(struct file *, void *, filldir_t, | |
28 | struct ncp_cache_control *); | |
29 | static void ncp_do_readdir(struct file *, void *, filldir_t, | |
30 | struct ncp_cache_control *); | |
31 | ||
32 | static int ncp_readdir(struct file *, void *, filldir_t); | |
33 | ||
34 | static int ncp_create(struct inode *, struct dentry *, int, struct nameidata *); | |
35 | static struct dentry *ncp_lookup(struct inode *, struct dentry *, struct nameidata *); | |
36 | static int ncp_unlink(struct inode *, struct dentry *); | |
37 | static int ncp_mkdir(struct inode *, struct dentry *, int); | |
38 | static int ncp_rmdir(struct inode *, struct dentry *); | |
39 | static int ncp_rename(struct inode *, struct dentry *, | |
40 | struct inode *, struct dentry *); | |
41 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, | |
42 | int mode, dev_t rdev); | |
43 | #if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS) | |
44 | extern int ncp_symlink(struct inode *, struct dentry *, const char *); | |
45 | #else | |
46 | #define ncp_symlink NULL | |
47 | #endif | |
48 | ||
4b6f5d20 | 49 | const struct file_operations ncp_dir_operations = |
1da177e4 | 50 | { |
ca572727 | 51 | .llseek = generic_file_llseek, |
1da177e4 LT |
52 | .read = generic_read_dir, |
53 | .readdir = ncp_readdir, | |
93d84b6d | 54 | .unlocked_ioctl = ncp_ioctl, |
54f67f63 PV |
55 | #ifdef CONFIG_COMPAT |
56 | .compat_ioctl = ncp_compat_ioctl, | |
57 | #endif | |
1da177e4 LT |
58 | }; |
59 | ||
92e1d5be | 60 | const struct inode_operations ncp_dir_inode_operations = |
1da177e4 LT |
61 | { |
62 | .create = ncp_create, | |
63 | .lookup = ncp_lookup, | |
64 | .unlink = ncp_unlink, | |
65 | .symlink = ncp_symlink, | |
66 | .mkdir = ncp_mkdir, | |
67 | .rmdir = ncp_rmdir, | |
68 | .mknod = ncp_mknod, | |
69 | .rename = ncp_rename, | |
70 | .setattr = ncp_notify_change, | |
71 | }; | |
72 | ||
73 | /* | |
74 | * Dentry operations routines | |
75 | */ | |
76 | static int ncp_lookup_validate(struct dentry *, struct nameidata *); | |
b1e6a015 NP |
77 | static int ncp_hash_dentry(const struct dentry *, const struct inode *, |
78 | struct qstr *); | |
621e155a NP |
79 | static int ncp_compare_dentry(const struct dentry *, const struct inode *, |
80 | const struct dentry *, const struct inode *, | |
81 | unsigned int, const char *, const struct qstr *); | |
fe15ce44 | 82 | static int ncp_delete_dentry(const struct dentry *); |
1da177e4 | 83 | |
e16404ed | 84 | static const struct dentry_operations ncp_dentry_operations = |
1da177e4 LT |
85 | { |
86 | .d_revalidate = ncp_lookup_validate, | |
87 | .d_hash = ncp_hash_dentry, | |
88 | .d_compare = ncp_compare_dentry, | |
89 | .d_delete = ncp_delete_dentry, | |
90 | }; | |
91 | ||
e16404ed | 92 | const struct dentry_operations ncp_root_dentry_operations = |
1da177e4 LT |
93 | { |
94 | .d_hash = ncp_hash_dentry, | |
95 | .d_compare = ncp_compare_dentry, | |
96 | .d_delete = ncp_delete_dentry, | |
97 | }; | |
98 | ||
99 | ||
2e54eb96 PV |
100 | #define ncp_namespace(i) (NCP_SERVER(i)->name_space[NCP_FINFO(i)->volNumber]) |
101 | ||
102 | static inline int ncp_preserve_entry_case(struct inode *i, __u32 nscreator) | |
103 | { | |
104 | #ifdef CONFIG_NCPFS_SMALLDOS | |
105 | int ns = ncp_namespace(i); | |
106 | ||
107 | if ((ns == NW_NS_DOS) | |
108 | #ifdef CONFIG_NCPFS_OS2_NS | |
109 | || ((ns == NW_NS_OS2) && (nscreator == NW_NS_DOS)) | |
110 | #endif /* CONFIG_NCPFS_OS2_NS */ | |
111 | ) | |
112 | return 0; | |
113 | #endif /* CONFIG_NCPFS_SMALLDOS */ | |
114 | return 1; | |
115 | } | |
116 | ||
117 | #define ncp_preserve_case(i) (ncp_namespace(i) != NW_NS_DOS) | |
118 | ||
621e155a | 119 | static inline int ncp_case_sensitive(const struct inode *i) |
2e54eb96 PV |
120 | { |
121 | #ifdef CONFIG_NCPFS_NFS_NS | |
621e155a | 122 | return ncp_namespace(i) == NW_NS_NFS; |
2e54eb96 PV |
123 | #else |
124 | return 0; | |
125 | #endif /* CONFIG_NCPFS_NFS_NS */ | |
126 | } | |
127 | ||
1da177e4 LT |
128 | /* |
129 | * Note: leave the hash unchanged if the directory | |
130 | * is case-sensitive. | |
131 | */ | |
132 | static int | |
b1e6a015 NP |
133 | ncp_hash_dentry(const struct dentry *dentry, const struct inode *inode, |
134 | struct qstr *this) | |
1da177e4 | 135 | { |
b1e6a015 | 136 | if (!ncp_case_sensitive(inode)) { |
621e155a | 137 | struct super_block *sb = dentry->d_sb; |
2e54eb96 PV |
138 | struct nls_table *t; |
139 | unsigned long hash; | |
140 | int i; | |
1da177e4 | 141 | |
621e155a | 142 | t = NCP_IO_TABLE(sb); |
1da177e4 LT |
143 | hash = init_name_hash(); |
144 | for (i=0; i<this->len ; i++) | |
145 | hash = partial_name_hash(ncp_tolower(t, this->name[i]), | |
146 | hash); | |
147 | this->hash = end_name_hash(hash); | |
148 | } | |
149 | return 0; | |
150 | } | |
151 | ||
152 | static int | |
621e155a NP |
153 | ncp_compare_dentry(const struct dentry *parent, const struct inode *pinode, |
154 | const struct dentry *dentry, const struct inode *inode, | |
155 | unsigned int len, const char *str, const struct qstr *name) | |
1da177e4 | 156 | { |
621e155a | 157 | if (len != name->len) |
1da177e4 LT |
158 | return 1; |
159 | ||
621e155a NP |
160 | if (ncp_case_sensitive(pinode)) |
161 | return strncmp(str, name->name, len); | |
1da177e4 | 162 | |
621e155a | 163 | return ncp_strnicmp(NCP_IO_TABLE(pinode->i_sb), str, name->name, len); |
1da177e4 LT |
164 | } |
165 | ||
166 | /* | |
167 | * This is the callback from dput() when d_count is going to 0. | |
168 | * We use this to unhash dentries with bad inodes. | |
169 | * Closing files can be safely postponed until iput() - it's done there anyway. | |
170 | */ | |
171 | static int | |
fe15ce44 | 172 | ncp_delete_dentry(const struct dentry * dentry) |
1da177e4 LT |
173 | { |
174 | struct inode *inode = dentry->d_inode; | |
175 | ||
176 | if (inode) { | |
177 | if (is_bad_inode(inode)) | |
178 | return 1; | |
179 | } else | |
180 | { | |
181 | /* N.B. Unhash negative dentries? */ | |
182 | } | |
183 | return 0; | |
184 | } | |
185 | ||
186 | static inline int | |
187 | ncp_single_volume(struct ncp_server *server) | |
188 | { | |
189 | return (server->m.mounted_vol[0] != '\0'); | |
190 | } | |
191 | ||
192 | static inline int ncp_is_server_root(struct inode *inode) | |
193 | { | |
194 | return (!ncp_single_volume(NCP_SERVER(inode)) && | |
195 | inode == inode->i_sb->s_root->d_inode); | |
196 | } | |
197 | ||
198 | ||
199 | /* | |
200 | * This is the callback when the dcache has a lookup hit. | |
201 | */ | |
202 | ||
203 | ||
204 | #ifdef CONFIG_NCPFS_STRONG | |
205 | /* try to delete a readonly file (NW R bit set) */ | |
206 | ||
207 | static int | |
208 | ncp_force_unlink(struct inode *dir, struct dentry* dentry) | |
209 | { | |
210 | int res=0x9c,res2; | |
211 | struct nw_modify_dos_info info; | |
212 | __le32 old_nwattr; | |
213 | struct inode *inode; | |
214 | ||
215 | memset(&info, 0, sizeof(info)); | |
216 | ||
217 | /* remove the Read-Only flag on the NW server */ | |
218 | inode = dentry->d_inode; | |
219 | ||
220 | old_nwattr = NCP_FINFO(inode)->nwattr; | |
221 | info.attributes = old_nwattr & ~(aRONLY|aDELETEINHIBIT|aRENAMEINHIBIT); | |
222 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); | |
223 | if (res2) | |
224 | goto leave_me; | |
225 | ||
226 | /* now try again the delete operation */ | |
227 | res = ncp_del_file_or_subdir2(NCP_SERVER(dir), dentry); | |
228 | ||
229 | if (res) /* delete failed, set R bit again */ | |
230 | { | |
231 | info.attributes = old_nwattr; | |
232 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(inode), inode, NULL, DM_ATTRIBUTES, &info); | |
233 | if (res2) | |
234 | goto leave_me; | |
235 | } | |
236 | leave_me: | |
237 | return(res); | |
238 | } | |
239 | #endif /* CONFIG_NCPFS_STRONG */ | |
240 | ||
241 | #ifdef CONFIG_NCPFS_STRONG | |
242 | static int | |
243 | ncp_force_rename(struct inode *old_dir, struct dentry* old_dentry, char *_old_name, | |
244 | struct inode *new_dir, struct dentry* new_dentry, char *_new_name) | |
245 | { | |
246 | struct nw_modify_dos_info info; | |
247 | int res=0x90,res2; | |
248 | struct inode *old_inode = old_dentry->d_inode; | |
249 | __le32 old_nwattr = NCP_FINFO(old_inode)->nwattr; | |
250 | __le32 new_nwattr = 0; /* shut compiler warning */ | |
251 | int old_nwattr_changed = 0; | |
252 | int new_nwattr_changed = 0; | |
253 | ||
254 | memset(&info, 0, sizeof(info)); | |
255 | ||
256 | /* remove the Read-Only flag on the NW server */ | |
257 | ||
258 | info.attributes = old_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); | |
259 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); | |
260 | if (!res2) | |
261 | old_nwattr_changed = 1; | |
262 | if (new_dentry && new_dentry->d_inode) { | |
263 | new_nwattr = NCP_FINFO(new_dentry->d_inode)->nwattr; | |
264 | info.attributes = new_nwattr & ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT); | |
265 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); | |
266 | if (!res2) | |
267 | new_nwattr_changed = 1; | |
268 | } | |
269 | /* now try again the rename operation */ | |
270 | /* but only if something really happened */ | |
271 | if (new_nwattr_changed || old_nwattr_changed) { | |
272 | res = ncp_ren_or_mov_file_or_subdir(NCP_SERVER(old_dir), | |
273 | old_dir, _old_name, | |
274 | new_dir, _new_name); | |
275 | } | |
276 | if (res) | |
277 | goto leave_me; | |
278 | /* file was successfully renamed, so: | |
279 | do not set attributes on old file - it no longer exists | |
280 | copy attributes from old file to new */ | |
281 | new_nwattr_changed = old_nwattr_changed; | |
282 | new_nwattr = old_nwattr; | |
283 | old_nwattr_changed = 0; | |
284 | ||
285 | leave_me:; | |
286 | if (old_nwattr_changed) { | |
287 | info.attributes = old_nwattr; | |
288 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(old_inode), old_inode, NULL, DM_ATTRIBUTES, &info); | |
289 | /* ignore errors */ | |
290 | } | |
291 | if (new_nwattr_changed) { | |
292 | info.attributes = new_nwattr; | |
293 | res2 = ncp_modify_file_or_subdir_dos_info_path(NCP_SERVER(new_dir), new_dir, _new_name, DM_ATTRIBUTES, &info); | |
294 | /* ignore errors */ | |
295 | } | |
296 | return(res); | |
297 | } | |
298 | #endif /* CONFIG_NCPFS_STRONG */ | |
299 | ||
300 | ||
301 | static int | |
2e54eb96 | 302 | ncp_lookup_validate(struct dentry *dentry, struct nameidata *nd) |
1da177e4 LT |
303 | { |
304 | struct ncp_server *server; | |
305 | struct dentry *parent; | |
306 | struct inode *dir; | |
307 | struct ncp_entry_info finfo; | |
308 | int res, val = 0, len; | |
309 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
310 | ||
311 | parent = dget_parent(dentry); | |
312 | dir = parent->d_inode; | |
313 | ||
314 | if (!dentry->d_inode) | |
315 | goto finished; | |
316 | ||
317 | server = NCP_SERVER(dir); | |
318 | ||
1da177e4 LT |
319 | /* |
320 | * Inspired by smbfs: | |
321 | * The default validation is based on dentry age: | |
322 | * We set the max age at mount time. (But each | |
323 | * successful server lookup renews the timestamp.) | |
324 | */ | |
325 | val = NCP_TEST_AGE(server, dentry); | |
326 | if (val) | |
327 | goto finished; | |
328 | ||
329 | DDPRINTK("ncp_lookup_validate: %s/%s not valid, age=%ld, server lookup\n", | |
330 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
331 | NCP_GET_AGE(dentry)); | |
332 | ||
333 | len = sizeof(__name); | |
334 | if (ncp_is_server_root(dir)) { | |
335 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
336 | dentry->d_name.len, 1); | |
2e54eb96 | 337 | if (!res) { |
1da177e4 | 338 | res = ncp_lookup_volume(server, __name, &(finfo.i)); |
2e54eb96 PV |
339 | if (!res) |
340 | ncp_update_known_namespace(server, finfo.i.volNumber, NULL); | |
341 | } | |
1da177e4 LT |
342 | } else { |
343 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
344 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
345 | if (!res) | |
346 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); | |
347 | } | |
348 | finfo.volume = finfo.i.volNumber; | |
349 | DDPRINTK("ncp_lookup_validate: looked for %s/%s, res=%d\n", | |
350 | dentry->d_parent->d_name.name, __name, res); | |
351 | /* | |
352 | * If we didn't find it, or if it has a different dirEntNum to | |
353 | * what we remember, it's not valid any more. | |
354 | */ | |
355 | if (!res) { | |
2e54eb96 PV |
356 | struct inode *inode = dentry->d_inode; |
357 | ||
358 | mutex_lock(&inode->i_mutex); | |
359 | if (finfo.i.dirEntNum == NCP_FINFO(inode)->dirEntNum) { | |
1da177e4 LT |
360 | ncp_new_dentry(dentry); |
361 | val=1; | |
362 | } else | |
363 | DDPRINTK("ncp_lookup_validate: found, but dirEntNum changed\n"); | |
364 | ||
2e54eb96 PV |
365 | ncp_update_inode2(inode, &finfo); |
366 | mutex_unlock(&inode->i_mutex); | |
1da177e4 LT |
367 | } |
368 | ||
369 | finished: | |
370 | DDPRINTK("ncp_lookup_validate: result=%d\n", val); | |
371 | dput(parent); | |
372 | return val; | |
373 | } | |
374 | ||
1da177e4 LT |
375 | static struct dentry * |
376 | ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos) | |
377 | { | |
378 | struct dentry *dent = dentry; | |
379 | struct list_head *next; | |
380 | ||
381 | if (d_validate(dent, parent)) { | |
382 | if (dent->d_name.len <= NCP_MAXPATHLEN && | |
383 | (unsigned long)dent->d_fsdata == fpos) { | |
384 | if (!dent->d_inode) { | |
385 | dput(dent); | |
386 | dent = NULL; | |
387 | } | |
388 | return dent; | |
389 | } | |
390 | dput(dent); | |
391 | } | |
392 | ||
393 | /* If a pointer is invalid, we search the dentry. */ | |
394 | spin_lock(&dcache_lock); | |
2fd6b7f5 | 395 | spin_lock(&parent->d_lock); |
1da177e4 LT |
396 | next = parent->d_subdirs.next; |
397 | while (next != &parent->d_subdirs) { | |
5160ee6f | 398 | dent = list_entry(next, struct dentry, d_u.d_child); |
1da177e4 LT |
399 | if ((unsigned long)dent->d_fsdata == fpos) { |
400 | if (dent->d_inode) | |
401 | dget_locked(dent); | |
402 | else | |
403 | dent = NULL; | |
2fd6b7f5 | 404 | spin_unlock(&parent->d_lock); |
1da177e4 LT |
405 | spin_unlock(&dcache_lock); |
406 | goto out; | |
407 | } | |
408 | next = next->next; | |
409 | } | |
2fd6b7f5 | 410 | spin_unlock(&parent->d_lock); |
1da177e4 LT |
411 | spin_unlock(&dcache_lock); |
412 | return NULL; | |
413 | ||
414 | out: | |
415 | return dent; | |
416 | } | |
417 | ||
418 | static time_t ncp_obtain_mtime(struct dentry *dentry) | |
419 | { | |
420 | struct inode *inode = dentry->d_inode; | |
421 | struct ncp_server *server = NCP_SERVER(inode); | |
422 | struct nw_info_struct i; | |
423 | ||
424 | if (!ncp_conn_valid(server) || ncp_is_server_root(inode)) | |
425 | return 0; | |
426 | ||
427 | if (ncp_obtain_info(server, inode, NULL, &i)) | |
428 | return 0; | |
429 | ||
430 | return ncp_date_dos2unix(i.modifyTime, i.modifyDate); | |
431 | } | |
432 | ||
433 | static int ncp_readdir(struct file *filp, void *dirent, filldir_t filldir) | |
434 | { | |
92e5baef | 435 | struct dentry *dentry = filp->f_path.dentry; |
1da177e4 LT |
436 | struct inode *inode = dentry->d_inode; |
437 | struct page *page = NULL; | |
438 | struct ncp_server *server = NCP_SERVER(inode); | |
439 | union ncp_dir_cache *cache = NULL; | |
440 | struct ncp_cache_control ctl; | |
441 | int result, mtime_valid = 0; | |
442 | time_t mtime = 0; | |
443 | ||
1da177e4 LT |
444 | ctl.page = NULL; |
445 | ctl.cache = NULL; | |
446 | ||
447 | DDPRINTK("ncp_readdir: reading %s/%s, pos=%d\n", | |
448 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
449 | (int) filp->f_pos); | |
450 | ||
451 | result = -EIO; | |
2e54eb96 | 452 | /* Do not generate '.' and '..' when server is dead. */ |
1da177e4 LT |
453 | if (!ncp_conn_valid(server)) |
454 | goto out; | |
455 | ||
456 | result = 0; | |
457 | if (filp->f_pos == 0) { | |
458 | if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR)) | |
459 | goto out; | |
460 | filp->f_pos = 1; | |
461 | } | |
462 | if (filp->f_pos == 1) { | |
463 | if (filldir(dirent, "..", 2, 1, parent_ino(dentry), DT_DIR)) | |
464 | goto out; | |
465 | filp->f_pos = 2; | |
466 | } | |
467 | ||
468 | page = grab_cache_page(&inode->i_data, 0); | |
469 | if (!page) | |
470 | goto read_really; | |
471 | ||
472 | ctl.cache = cache = kmap(page); | |
473 | ctl.head = cache->head; | |
474 | ||
475 | if (!PageUptodate(page) || !ctl.head.eof) | |
476 | goto init_cache; | |
477 | ||
478 | if (filp->f_pos == 2) { | |
479 | if (jiffies - ctl.head.time >= NCP_MAX_AGE(server)) | |
480 | goto init_cache; | |
481 | ||
482 | mtime = ncp_obtain_mtime(dentry); | |
483 | mtime_valid = 1; | |
484 | if ((!mtime) || (mtime != ctl.head.mtime)) | |
485 | goto init_cache; | |
486 | } | |
487 | ||
488 | if (filp->f_pos > ctl.head.end) | |
489 | goto finished; | |
490 | ||
491 | ctl.fpos = filp->f_pos + (NCP_DIRCACHE_START - 2); | |
492 | ctl.ofs = ctl.fpos / NCP_DIRCACHE_SIZE; | |
493 | ctl.idx = ctl.fpos % NCP_DIRCACHE_SIZE; | |
494 | ||
495 | for (;;) { | |
496 | if (ctl.ofs != 0) { | |
497 | ctl.page = find_lock_page(&inode->i_data, ctl.ofs); | |
498 | if (!ctl.page) | |
499 | goto invalid_cache; | |
500 | ctl.cache = kmap(ctl.page); | |
501 | if (!PageUptodate(ctl.page)) | |
502 | goto invalid_cache; | |
503 | } | |
504 | while (ctl.idx < NCP_DIRCACHE_SIZE) { | |
505 | struct dentry *dent; | |
506 | int res; | |
507 | ||
508 | dent = ncp_dget_fpos(ctl.cache->dentry[ctl.idx], | |
509 | dentry, filp->f_pos); | |
510 | if (!dent) | |
511 | goto invalid_cache; | |
512 | res = filldir(dirent, dent->d_name.name, | |
513 | dent->d_name.len, filp->f_pos, | |
514 | dent->d_inode->i_ino, DT_UNKNOWN); | |
515 | dput(dent); | |
516 | if (res) | |
517 | goto finished; | |
518 | filp->f_pos += 1; | |
519 | ctl.idx += 1; | |
520 | if (filp->f_pos > ctl.head.end) | |
521 | goto finished; | |
522 | } | |
523 | if (ctl.page) { | |
524 | kunmap(ctl.page); | |
525 | SetPageUptodate(ctl.page); | |
526 | unlock_page(ctl.page); | |
527 | page_cache_release(ctl.page); | |
528 | ctl.page = NULL; | |
529 | } | |
530 | ctl.idx = 0; | |
531 | ctl.ofs += 1; | |
532 | } | |
533 | invalid_cache: | |
534 | if (ctl.page) { | |
535 | kunmap(ctl.page); | |
536 | unlock_page(ctl.page); | |
537 | page_cache_release(ctl.page); | |
538 | ctl.page = NULL; | |
539 | } | |
540 | ctl.cache = cache; | |
541 | init_cache: | |
542 | ncp_invalidate_dircache_entries(dentry); | |
543 | if (!mtime_valid) { | |
544 | mtime = ncp_obtain_mtime(dentry); | |
545 | mtime_valid = 1; | |
546 | } | |
547 | ctl.head.mtime = mtime; | |
548 | ctl.head.time = jiffies; | |
549 | ctl.head.eof = 0; | |
550 | ctl.fpos = 2; | |
551 | ctl.ofs = 0; | |
552 | ctl.idx = NCP_DIRCACHE_START; | |
553 | ctl.filled = 0; | |
554 | ctl.valid = 1; | |
555 | read_really: | |
556 | if (ncp_is_server_root(inode)) { | |
557 | ncp_read_volume_list(filp, dirent, filldir, &ctl); | |
558 | } else { | |
559 | ncp_do_readdir(filp, dirent, filldir, &ctl); | |
560 | } | |
561 | ctl.head.end = ctl.fpos - 1; | |
562 | ctl.head.eof = ctl.valid; | |
563 | finished: | |
2e54eb96 PV |
564 | if (ctl.page) { |
565 | kunmap(ctl.page); | |
566 | SetPageUptodate(ctl.page); | |
567 | unlock_page(ctl.page); | |
568 | page_cache_release(ctl.page); | |
569 | } | |
1da177e4 LT |
570 | if (page) { |
571 | cache->head = ctl.head; | |
572 | kunmap(page); | |
573 | SetPageUptodate(page); | |
574 | unlock_page(page); | |
575 | page_cache_release(page); | |
576 | } | |
1da177e4 | 577 | out: |
1da177e4 LT |
578 | return result; |
579 | } | |
580 | ||
581 | static int | |
582 | ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, | |
2e54eb96 PV |
583 | struct ncp_cache_control *ctrl, struct ncp_entry_info *entry, |
584 | int inval_childs) | |
1da177e4 | 585 | { |
92e5baef | 586 | struct dentry *newdent, *dentry = filp->f_path.dentry; |
2e54eb96 | 587 | struct inode *dir = dentry->d_inode; |
1da177e4 LT |
588 | struct ncp_cache_control ctl = *ctrl; |
589 | struct qstr qname; | |
590 | int valid = 0; | |
591 | int hashed = 0; | |
592 | ino_t ino = 0; | |
593 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
594 | ||
595 | qname.len = sizeof(__name); | |
2e54eb96 | 596 | if (ncp_vol2io(NCP_SERVER(dir), __name, &qname.len, |
1da177e4 | 597 | entry->i.entryName, entry->i.nameLen, |
2e54eb96 | 598 | !ncp_preserve_entry_case(dir, entry->i.NSCreator))) |
1da177e4 LT |
599 | return 1; /* I'm not sure */ |
600 | ||
601 | qname.name = __name; | |
602 | qname.hash = full_name_hash(qname.name, qname.len); | |
603 | ||
604 | if (dentry->d_op && dentry->d_op->d_hash) | |
b1e6a015 | 605 | if (dentry->d_op->d_hash(dentry, dentry->d_inode, &qname) != 0) |
1da177e4 LT |
606 | goto end_advance; |
607 | ||
608 | newdent = d_lookup(dentry, &qname); | |
609 | ||
610 | if (!newdent) { | |
611 | newdent = d_alloc(dentry, &qname); | |
612 | if (!newdent) | |
613 | goto end_advance; | |
614 | } else { | |
615 | hashed = 1; | |
2e54eb96 PV |
616 | |
617 | /* If case sensitivity changed for this volume, all entries below this one | |
618 | should be thrown away. This entry itself is not affected, as its case | |
619 | sensitivity is controlled by its own parent. */ | |
620 | if (inval_childs) | |
621 | shrink_dcache_parent(newdent); | |
622 | ||
623 | /* | |
fb2d5b86 NP |
624 | * NetWare's OS2 namespace is case preserving yet case |
625 | * insensitive. So we update dentry's name as received from | |
626 | * server. Parent dir's i_mutex is locked because we're in | |
627 | * readdir. | |
2e54eb96 | 628 | */ |
fb2d5b86 | 629 | dentry_update_name_case(newdent, &qname); |
1da177e4 LT |
630 | } |
631 | ||
632 | if (!newdent->d_inode) { | |
2e54eb96 PV |
633 | struct inode *inode; |
634 | ||
1da177e4 | 635 | entry->opened = 0; |
2e54eb96 PV |
636 | entry->ino = iunique(dir->i_sb, 2); |
637 | inode = ncp_iget(dir->i_sb, entry); | |
638 | if (inode) { | |
1da177e4 | 639 | newdent->d_op = &ncp_dentry_operations; |
2e54eb96 | 640 | d_instantiate(newdent, inode); |
1da177e4 LT |
641 | if (!hashed) |
642 | d_rehash(newdent); | |
643 | } | |
2e54eb96 PV |
644 | } else { |
645 | struct inode *inode = newdent->d_inode; | |
646 | ||
fb2d5b86 | 647 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); |
2e54eb96 PV |
648 | ncp_update_inode2(inode, entry); |
649 | mutex_unlock(&inode->i_mutex); | |
650 | } | |
1da177e4 LT |
651 | |
652 | if (newdent->d_inode) { | |
653 | ino = newdent->d_inode->i_ino; | |
654 | newdent->d_fsdata = (void *) ctl.fpos; | |
655 | ncp_new_dentry(newdent); | |
656 | } | |
657 | ||
658 | if (ctl.idx >= NCP_DIRCACHE_SIZE) { | |
659 | if (ctl.page) { | |
660 | kunmap(ctl.page); | |
661 | SetPageUptodate(ctl.page); | |
662 | unlock_page(ctl.page); | |
663 | page_cache_release(ctl.page); | |
664 | } | |
665 | ctl.cache = NULL; | |
666 | ctl.idx -= NCP_DIRCACHE_SIZE; | |
667 | ctl.ofs += 1; | |
2e54eb96 | 668 | ctl.page = grab_cache_page(&dir->i_data, ctl.ofs); |
1da177e4 LT |
669 | if (ctl.page) |
670 | ctl.cache = kmap(ctl.page); | |
671 | } | |
672 | if (ctl.cache) { | |
673 | ctl.cache->dentry[ctl.idx] = newdent; | |
674 | valid = 1; | |
675 | } | |
676 | dput(newdent); | |
677 | end_advance: | |
678 | if (!valid) | |
679 | ctl.valid = 0; | |
680 | if (!ctl.filled && (ctl.fpos == filp->f_pos)) { | |
681 | if (!ino) | |
682 | ino = find_inode_number(dentry, &qname); | |
683 | if (!ino) | |
2e54eb96 | 684 | ino = iunique(dir->i_sb, 2); |
1da177e4 LT |
685 | ctl.filled = filldir(dirent, qname.name, qname.len, |
686 | filp->f_pos, ino, DT_UNKNOWN); | |
687 | if (!ctl.filled) | |
688 | filp->f_pos += 1; | |
689 | } | |
690 | ctl.fpos += 1; | |
691 | ctl.idx += 1; | |
692 | *ctrl = ctl; | |
693 | return (ctl.valid || !ctl.filled); | |
694 | } | |
695 | ||
696 | static void | |
697 | ncp_read_volume_list(struct file *filp, void *dirent, filldir_t filldir, | |
698 | struct ncp_cache_control *ctl) | |
699 | { | |
92e5baef | 700 | struct dentry *dentry = filp->f_path.dentry; |
1da177e4 LT |
701 | struct inode *inode = dentry->d_inode; |
702 | struct ncp_server *server = NCP_SERVER(inode); | |
703 | struct ncp_volume_info info; | |
704 | struct ncp_entry_info entry; | |
705 | int i; | |
706 | ||
707 | DPRINTK("ncp_read_volume_list: pos=%ld\n", | |
708 | (unsigned long) filp->f_pos); | |
709 | ||
710 | for (i = 0; i < NCP_NUMBER_OF_VOLUMES; i++) { | |
2e54eb96 | 711 | int inval_dentry; |
1da177e4 LT |
712 | |
713 | if (ncp_get_volume_info_with_number(server, i, &info) != 0) | |
714 | return; | |
715 | if (!strlen(info.volume_name)) | |
716 | continue; | |
717 | ||
718 | DPRINTK("ncp_read_volume_list: found vol: %s\n", | |
719 | info.volume_name); | |
720 | ||
721 | if (ncp_lookup_volume(server, info.volume_name, | |
722 | &entry.i)) { | |
723 | DPRINTK("ncpfs: could not lookup vol %s\n", | |
724 | info.volume_name); | |
725 | continue; | |
726 | } | |
2e54eb96 | 727 | inval_dentry = ncp_update_known_namespace(server, entry.i.volNumber, NULL); |
1da177e4 | 728 | entry.volume = entry.i.volNumber; |
2e54eb96 | 729 | if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry, inval_dentry)) |
1da177e4 LT |
730 | return; |
731 | } | |
732 | } | |
733 | ||
734 | static void | |
735 | ncp_do_readdir(struct file *filp, void *dirent, filldir_t filldir, | |
736 | struct ncp_cache_control *ctl) | |
737 | { | |
92e5baef | 738 | struct dentry *dentry = filp->f_path.dentry; |
1da177e4 LT |
739 | struct inode *dir = dentry->d_inode; |
740 | struct ncp_server *server = NCP_SERVER(dir); | |
741 | struct nw_search_sequence seq; | |
742 | struct ncp_entry_info entry; | |
743 | int err; | |
744 | void* buf; | |
745 | int more; | |
746 | size_t bufsize; | |
747 | ||
748 | DPRINTK("ncp_do_readdir: %s/%s, fpos=%ld\n", | |
749 | dentry->d_parent->d_name.name, dentry->d_name.name, | |
750 | (unsigned long) filp->f_pos); | |
751 | PPRINTK("ncp_do_readdir: init %s, volnum=%d, dirent=%u\n", | |
752 | dentry->d_name.name, NCP_FINFO(dir)->volNumber, | |
753 | NCP_FINFO(dir)->dirEntNum); | |
754 | ||
755 | err = ncp_initialize_search(server, dir, &seq); | |
756 | if (err) { | |
757 | DPRINTK("ncp_do_readdir: init failed, err=%d\n", err); | |
758 | return; | |
759 | } | |
1da177e4 LT |
760 | /* We MUST NOT use server->buffer_size handshaked with server if we are |
761 | using UDP, as for UDP server uses max. buffer size determined by | |
762 | MTU, and for TCP server uses hardwired value 65KB (== 66560 bytes). | |
763 | So we use 128KB, just to be sure, as there is no way how to know | |
764 | this value in advance. */ | |
765 | bufsize = 131072; | |
766 | buf = vmalloc(bufsize); | |
767 | if (!buf) | |
768 | return; | |
769 | do { | |
770 | int cnt; | |
771 | char* rpl; | |
772 | size_t rpls; | |
773 | ||
774 | err = ncp_search_for_fileset(server, &seq, &more, &cnt, buf, bufsize, &rpl, &rpls); | |
775 | if (err) /* Error */ | |
776 | break; | |
777 | if (!cnt) /* prevent endless loop */ | |
778 | break; | |
779 | while (cnt--) { | |
780 | size_t onerpl; | |
781 | ||
782 | if (rpls < offsetof(struct nw_info_struct, entryName)) | |
783 | break; /* short packet */ | |
784 | ncp_extract_file_info(rpl, &entry.i); | |
785 | onerpl = offsetof(struct nw_info_struct, entryName) + entry.i.nameLen; | |
786 | if (rpls < onerpl) | |
787 | break; /* short packet */ | |
788 | (void)ncp_obtain_nfs_info(server, &entry.i); | |
789 | rpl += onerpl; | |
790 | rpls -= onerpl; | |
791 | entry.volume = entry.i.volNumber; | |
2e54eb96 | 792 | if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry, 0)) |
1da177e4 LT |
793 | break; |
794 | } | |
795 | } while (more); | |
796 | vfree(buf); | |
1da177e4 LT |
797 | return; |
798 | } | |
799 | ||
800 | int ncp_conn_logged_in(struct super_block *sb) | |
801 | { | |
802 | struct ncp_server* server = NCP_SBP(sb); | |
803 | int result; | |
804 | ||
805 | if (ncp_single_volume(server)) { | |
806 | int len; | |
807 | struct dentry* dent; | |
808 | __u32 volNumber; | |
809 | __le32 dirEntNum; | |
810 | __le32 DosDirNum; | |
811 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
812 | ||
813 | len = sizeof(__name); | |
814 | result = ncp_io2vol(server, __name, &len, server->m.mounted_vol, | |
815 | strlen(server->m.mounted_vol), 1); | |
816 | if (result) | |
817 | goto out; | |
818 | result = -ENOENT; | |
819 | if (ncp_get_volume_root(server, __name, &volNumber, &dirEntNum, &DosDirNum)) { | |
820 | PPRINTK("ncp_conn_logged_in: %s not found\n", | |
821 | server->m.mounted_vol); | |
822 | goto out; | |
823 | } | |
824 | dent = sb->s_root; | |
825 | if (dent) { | |
826 | struct inode* ino = dent->d_inode; | |
827 | if (ino) { | |
2e54eb96 | 828 | ncp_update_known_namespace(server, volNumber, NULL); |
1da177e4 LT |
829 | NCP_FINFO(ino)->volNumber = volNumber; |
830 | NCP_FINFO(ino)->dirEntNum = dirEntNum; | |
831 | NCP_FINFO(ino)->DosDirNum = DosDirNum; | |
2e54eb96 | 832 | result = 0; |
1da177e4 LT |
833 | } else { |
834 | DPRINTK("ncpfs: sb->s_root->d_inode == NULL!\n"); | |
835 | } | |
836 | } else { | |
837 | DPRINTK("ncpfs: sb->s_root == NULL!\n"); | |
838 | } | |
2e54eb96 PV |
839 | } else |
840 | result = 0; | |
1da177e4 LT |
841 | |
842 | out: | |
843 | return result; | |
844 | } | |
845 | ||
846 | static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) | |
847 | { | |
848 | struct ncp_server *server = NCP_SERVER(dir); | |
849 | struct inode *inode = NULL; | |
850 | struct ncp_entry_info finfo; | |
851 | int error, res, len; | |
852 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
853 | ||
1da177e4 LT |
854 | error = -EIO; |
855 | if (!ncp_conn_valid(server)) | |
856 | goto finished; | |
857 | ||
858 | PPRINTK("ncp_lookup: server lookup for %s/%s\n", | |
859 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
860 | ||
861 | len = sizeof(__name); | |
862 | if (ncp_is_server_root(dir)) { | |
863 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
864 | dentry->d_name.len, 1); | |
865 | if (!res) | |
866 | res = ncp_lookup_volume(server, __name, &(finfo.i)); | |
2e54eb96 PV |
867 | if (!res) |
868 | ncp_update_known_namespace(server, finfo.i.volNumber, NULL); | |
1da177e4 LT |
869 | } else { |
870 | res = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
871 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
872 | if (!res) | |
873 | res = ncp_obtain_info(server, dir, __name, &(finfo.i)); | |
874 | } | |
875 | PPRINTK("ncp_lookup: looked for %s/%s, res=%d\n", | |
876 | dentry->d_parent->d_name.name, __name, res); | |
877 | /* | |
878 | * If we didn't find an entry, make a negative dentry. | |
879 | */ | |
880 | if (res) | |
881 | goto add_entry; | |
882 | ||
883 | /* | |
884 | * Create an inode for the entry. | |
885 | */ | |
886 | finfo.opened = 0; | |
887 | finfo.ino = iunique(dir->i_sb, 2); | |
888 | finfo.volume = finfo.i.volNumber; | |
889 | error = -EACCES; | |
890 | inode = ncp_iget(dir->i_sb, &finfo); | |
891 | ||
892 | if (inode) { | |
893 | ncp_new_dentry(dentry); | |
894 | add_entry: | |
895 | dentry->d_op = &ncp_dentry_operations; | |
896 | d_add(dentry, inode); | |
897 | error = 0; | |
898 | } | |
899 | ||
900 | finished: | |
901 | PPRINTK("ncp_lookup: result=%d\n", error); | |
1da177e4 LT |
902 | return ERR_PTR(error); |
903 | } | |
904 | ||
905 | /* | |
906 | * This code is common to create, mkdir, and mknod. | |
907 | */ | |
908 | static int ncp_instantiate(struct inode *dir, struct dentry *dentry, | |
909 | struct ncp_entry_info *finfo) | |
910 | { | |
911 | struct inode *inode; | |
912 | int error = -EINVAL; | |
913 | ||
914 | finfo->ino = iunique(dir->i_sb, 2); | |
915 | inode = ncp_iget(dir->i_sb, finfo); | |
916 | if (!inode) | |
917 | goto out_close; | |
918 | d_instantiate(dentry,inode); | |
919 | error = 0; | |
920 | out: | |
921 | return error; | |
922 | ||
923 | out_close: | |
924 | PPRINTK("ncp_instantiate: %s/%s failed, closing file\n", | |
925 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
926 | ncp_close_file(NCP_SERVER(dir), finfo->file_handle); | |
927 | goto out; | |
928 | } | |
929 | ||
930 | int ncp_create_new(struct inode *dir, struct dentry *dentry, int mode, | |
931 | dev_t rdev, __le32 attributes) | |
932 | { | |
933 | struct ncp_server *server = NCP_SERVER(dir); | |
934 | struct ncp_entry_info finfo; | |
935 | int error, result, len; | |
936 | int opmode; | |
937 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
938 | ||
939 | PPRINTK("ncp_create_new: creating %s/%s, mode=%x\n", | |
940 | dentry->d_parent->d_name.name, dentry->d_name.name, mode); | |
941 | ||
1da177e4 LT |
942 | ncp_age_dentry(server, dentry); |
943 | len = sizeof(__name); | |
944 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
945 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
946 | if (error) | |
947 | goto out; | |
948 | ||
949 | error = -EACCES; | |
950 | ||
951 | if (S_ISREG(mode) && | |
952 | (server->m.flags & NCP_MOUNT_EXTRAS) && | |
953 | (mode & S_IXUGO)) | |
954 | attributes |= aSYSTEM | aSHARED; | |
955 | ||
956 | result = ncp_open_create_file_or_subdir(server, dir, __name, | |
957 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, | |
958 | attributes, AR_READ | AR_WRITE, &finfo); | |
959 | opmode = O_RDWR; | |
960 | if (result) { | |
961 | result = ncp_open_create_file_or_subdir(server, dir, __name, | |
962 | OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE, | |
963 | attributes, AR_WRITE, &finfo); | |
964 | if (result) { | |
965 | if (result == 0x87) | |
966 | error = -ENAMETOOLONG; | |
2e54eb96 PV |
967 | else if (result < 0) |
968 | error = result; | |
1da177e4 LT |
969 | DPRINTK("ncp_create: %s/%s failed\n", |
970 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
971 | goto out; | |
972 | } | |
973 | opmode = O_WRONLY; | |
974 | } | |
975 | finfo.access = opmode; | |
976 | if (ncp_is_nfs_extras(server, finfo.volume)) { | |
977 | finfo.i.nfs.mode = mode; | |
978 | finfo.i.nfs.rdev = new_encode_dev(rdev); | |
979 | if (ncp_modify_nfs_info(server, finfo.volume, | |
980 | finfo.i.dirEntNum, | |
981 | mode, new_encode_dev(rdev)) != 0) | |
982 | goto out; | |
983 | } | |
984 | ||
985 | error = ncp_instantiate(dir, dentry, &finfo); | |
986 | out: | |
1da177e4 LT |
987 | return error; |
988 | } | |
989 | ||
990 | static int ncp_create(struct inode *dir, struct dentry *dentry, int mode, | |
991 | struct nameidata *nd) | |
992 | { | |
993 | return ncp_create_new(dir, dentry, mode, 0, 0); | |
994 | } | |
995 | ||
996 | static int ncp_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
997 | { | |
998 | struct ncp_entry_info finfo; | |
999 | struct ncp_server *server = NCP_SERVER(dir); | |
1000 | int error, len; | |
1001 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
1002 | ||
1003 | DPRINTK("ncp_mkdir: making %s/%s\n", | |
1004 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1005 | ||
1da177e4 LT |
1006 | ncp_age_dentry(server, dentry); |
1007 | len = sizeof(__name); | |
1008 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
1009 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
1010 | if (error) | |
1011 | goto out; | |
1012 | ||
2e54eb96 | 1013 | error = ncp_open_create_file_or_subdir(server, dir, __name, |
1da177e4 LT |
1014 | OC_MODE_CREATE, aDIR, |
1015 | cpu_to_le16(0xffff), | |
2e54eb96 PV |
1016 | &finfo); |
1017 | if (error == 0) { | |
1da177e4 LT |
1018 | if (ncp_is_nfs_extras(server, finfo.volume)) { |
1019 | mode |= S_IFDIR; | |
1020 | finfo.i.nfs.mode = mode; | |
1021 | if (ncp_modify_nfs_info(server, | |
1022 | finfo.volume, | |
1023 | finfo.i.dirEntNum, | |
1024 | mode, 0) != 0) | |
1025 | goto out; | |
1026 | } | |
1027 | error = ncp_instantiate(dir, dentry, &finfo); | |
2e54eb96 PV |
1028 | } else if (error > 0) { |
1029 | error = -EACCES; | |
1da177e4 LT |
1030 | } |
1031 | out: | |
1da177e4 LT |
1032 | return error; |
1033 | } | |
1034 | ||
1035 | static int ncp_rmdir(struct inode *dir, struct dentry *dentry) | |
1036 | { | |
1037 | struct ncp_server *server = NCP_SERVER(dir); | |
1038 | int error, result, len; | |
1039 | __u8 __name[NCP_MAXPATHLEN + 1]; | |
1040 | ||
1041 | DPRINTK("ncp_rmdir: removing %s/%s\n", | |
1042 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1043 | ||
1da177e4 LT |
1044 | error = -EBUSY; |
1045 | if (!d_unhashed(dentry)) | |
1046 | goto out; | |
1047 | ||
1048 | len = sizeof(__name); | |
1049 | error = ncp_io2vol(server, __name, &len, dentry->d_name.name, | |
1050 | dentry->d_name.len, !ncp_preserve_case(dir)); | |
1051 | if (error) | |
1052 | goto out; | |
1053 | ||
1054 | result = ncp_del_file_or_subdir(server, dir, __name); | |
1055 | switch (result) { | |
1056 | case 0x00: | |
1057 | error = 0; | |
1058 | break; | |
1059 | case 0x85: /* unauthorized to delete file */ | |
1060 | case 0x8A: /* unauthorized to delete file */ | |
1061 | error = -EACCES; | |
1062 | break; | |
1063 | case 0x8F: | |
1064 | case 0x90: /* read only */ | |
1065 | error = -EPERM; | |
1066 | break; | |
1067 | case 0x9F: /* in use by another client */ | |
1068 | error = -EBUSY; | |
1069 | break; | |
1070 | case 0xA0: /* directory not empty */ | |
1071 | error = -ENOTEMPTY; | |
1072 | break; | |
1073 | case 0xFF: /* someone deleted file */ | |
1074 | error = -ENOENT; | |
1075 | break; | |
1076 | default: | |
2e54eb96 | 1077 | error = result < 0 ? result : -EACCES; |
1da177e4 LT |
1078 | break; |
1079 | } | |
1080 | out: | |
1da177e4 LT |
1081 | return error; |
1082 | } | |
1083 | ||
1084 | static int ncp_unlink(struct inode *dir, struct dentry *dentry) | |
1085 | { | |
1086 | struct inode *inode = dentry->d_inode; | |
1087 | struct ncp_server *server; | |
1088 | int error; | |
1089 | ||
1da177e4 LT |
1090 | server = NCP_SERVER(dir); |
1091 | DPRINTK("ncp_unlink: unlinking %s/%s\n", | |
1092 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1093 | ||
1da177e4 LT |
1094 | /* |
1095 | * Check whether to close the file ... | |
1096 | */ | |
1097 | if (inode) { | |
1098 | PPRINTK("ncp_unlink: closing file\n"); | |
1099 | ncp_make_closed(inode); | |
1100 | } | |
1101 | ||
1102 | error = ncp_del_file_or_subdir2(server, dentry); | |
1103 | #ifdef CONFIG_NCPFS_STRONG | |
1104 | /* 9C is Invalid path.. It should be 8F, 90 - read only, but | |
1105 | it is not :-( */ | |
1106 | if ((error == 0x9C || error == 0x90) && server->m.flags & NCP_MOUNT_STRONG) { /* R/O */ | |
1107 | error = ncp_force_unlink(dir, dentry); | |
1108 | } | |
1109 | #endif | |
1110 | switch (error) { | |
1111 | case 0x00: | |
1112 | DPRINTK("ncp: removed %s/%s\n", | |
1113 | dentry->d_parent->d_name.name, dentry->d_name.name); | |
1114 | break; | |
1115 | case 0x85: | |
1116 | case 0x8A: | |
1117 | error = -EACCES; | |
1118 | break; | |
1119 | case 0x8D: /* some files in use */ | |
1120 | case 0x8E: /* all files in use */ | |
1121 | error = -EBUSY; | |
1122 | break; | |
1123 | case 0x8F: /* some read only */ | |
1124 | case 0x90: /* all read only */ | |
1125 | case 0x9C: /* !!! returned when in-use or read-only by NW4 */ | |
1126 | error = -EPERM; | |
1127 | break; | |
1128 | case 0xFF: | |
1129 | error = -ENOENT; | |
1130 | break; | |
1131 | default: | |
2e54eb96 | 1132 | error = error < 0 ? error : -EACCES; |
1da177e4 LT |
1133 | break; |
1134 | } | |
1da177e4 LT |
1135 | return error; |
1136 | } | |
1137 | ||
1138 | static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry, | |
1139 | struct inode *new_dir, struct dentry *new_dentry) | |
1140 | { | |
1141 | struct ncp_server *server = NCP_SERVER(old_dir); | |
1142 | int error; | |
1143 | int old_len, new_len; | |
1144 | __u8 __old_name[NCP_MAXPATHLEN + 1], __new_name[NCP_MAXPATHLEN + 1]; | |
1145 | ||
1146 | DPRINTK("ncp_rename: %s/%s to %s/%s\n", | |
1147 | old_dentry->d_parent->d_name.name, old_dentry->d_name.name, | |
1148 | new_dentry->d_parent->d_name.name, new_dentry->d_name.name); | |
1149 | ||
1da177e4 LT |
1150 | ncp_age_dentry(server, old_dentry); |
1151 | ncp_age_dentry(server, new_dentry); | |
1152 | ||
1153 | old_len = sizeof(__old_name); | |
1154 | error = ncp_io2vol(server, __old_name, &old_len, | |
1155 | old_dentry->d_name.name, old_dentry->d_name.len, | |
1156 | !ncp_preserve_case(old_dir)); | |
1157 | if (error) | |
1158 | goto out; | |
1159 | ||
1160 | new_len = sizeof(__new_name); | |
1161 | error = ncp_io2vol(server, __new_name, &new_len, | |
1162 | new_dentry->d_name.name, new_dentry->d_name.len, | |
1163 | !ncp_preserve_case(new_dir)); | |
1164 | if (error) | |
1165 | goto out; | |
1166 | ||
1167 | error = ncp_ren_or_mov_file_or_subdir(server, old_dir, __old_name, | |
1168 | new_dir, __new_name); | |
1169 | #ifdef CONFIG_NCPFS_STRONG | |
1170 | if ((error == 0x90 || error == 0x8B || error == -EACCES) && | |
1171 | server->m.flags & NCP_MOUNT_STRONG) { /* RO */ | |
1172 | error = ncp_force_rename(old_dir, old_dentry, __old_name, | |
1173 | new_dir, new_dentry, __new_name); | |
1174 | } | |
1175 | #endif | |
1176 | switch (error) { | |
1177 | case 0x00: | |
1178 | DPRINTK("ncp renamed %s -> %s.\n", | |
1179 | old_dentry->d_name.name,new_dentry->d_name.name); | |
1180 | break; | |
1181 | case 0x9E: | |
1182 | error = -ENAMETOOLONG; | |
1183 | break; | |
1184 | case 0xFF: | |
1185 | error = -ENOENT; | |
1186 | break; | |
1187 | default: | |
2e54eb96 | 1188 | error = error < 0 ? error : -EACCES; |
1da177e4 LT |
1189 | break; |
1190 | } | |
1191 | out: | |
1da177e4 LT |
1192 | return error; |
1193 | } | |
1194 | ||
1195 | static int ncp_mknod(struct inode * dir, struct dentry *dentry, | |
1196 | int mode, dev_t rdev) | |
1197 | { | |
1198 | if (!new_valid_dev(rdev)) | |
1199 | return -EINVAL; | |
1200 | if (ncp_is_nfs_extras(NCP_SERVER(dir), NCP_FINFO(dir)->volNumber)) { | |
1201 | DPRINTK(KERN_DEBUG "ncp_mknod: mode = 0%o\n", mode); | |
1202 | return ncp_create_new(dir, dentry, mode, rdev, 0); | |
1203 | } | |
1204 | return -EPERM; /* Strange, but true */ | |
1205 | } | |
1206 | ||
1207 | /* The following routines are taken directly from msdos-fs */ | |
1208 | ||
1209 | /* Linear day numbers of the respective 1sts in non-leap years. */ | |
1210 | ||
1211 | static int day_n[] = | |
1212 | {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0}; | |
1213 | /* Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec */ | |
1214 | ||
1215 | ||
1216 | extern struct timezone sys_tz; | |
1217 | ||
1218 | static int utc2local(int time) | |
1219 | { | |
1220 | return time - sys_tz.tz_minuteswest * 60; | |
1221 | } | |
1222 | ||
1223 | static int local2utc(int time) | |
1224 | { | |
1225 | return time + sys_tz.tz_minuteswest * 60; | |
1226 | } | |
1227 | ||
1228 | /* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */ | |
1229 | int | |
1230 | ncp_date_dos2unix(__le16 t, __le16 d) | |
1231 | { | |
1232 | unsigned short time = le16_to_cpu(t), date = le16_to_cpu(d); | |
1233 | int month, year, secs; | |
1234 | ||
1235 | /* first subtract and mask after that... Otherwise, if | |
1236 | date == 0, bad things happen */ | |
1237 | month = ((date >> 5) - 1) & 15; | |
1238 | year = date >> 9; | |
1239 | secs = (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 + | |
1240 | 86400 * ((date & 31) - 1 + day_n[month] + (year / 4) + | |
1241 | year * 365 - ((year & 3) == 0 && month < 2 ? 1 : 0) + 3653); | |
1242 | /* days since 1.1.70 plus 80's leap day */ | |
1243 | return local2utc(secs); | |
1244 | } | |
1245 | ||
1246 | ||
1247 | /* Convert linear UNIX date to a MS-DOS time/date pair. */ | |
1248 | void | |
1249 | ncp_date_unix2dos(int unix_date, __le16 *time, __le16 *date) | |
1250 | { | |
1251 | int day, year, nl_day, month; | |
1252 | ||
1253 | unix_date = utc2local(unix_date); | |
1254 | *time = cpu_to_le16( | |
1255 | (unix_date % 60) / 2 + (((unix_date / 60) % 60) << 5) + | |
1256 | (((unix_date / 3600) % 24) << 11)); | |
1257 | day = unix_date / 86400 - 3652; | |
1258 | year = day / 365; | |
1259 | if ((year + 3) / 4 + 365 * year > day) | |
1260 | year--; | |
1261 | day -= (year + 3) / 4 + 365 * year; | |
1262 | if (day == 59 && !(year & 3)) { | |
1263 | nl_day = day; | |
1264 | month = 2; | |
1265 | } else { | |
1266 | nl_day = (year & 3) || day <= 59 ? day : day - 1; | |
c5df5913 | 1267 | for (month = 1; month < 12; month++) |
1da177e4 LT |
1268 | if (day_n[month] > nl_day) |
1269 | break; | |
1270 | } | |
1271 | *date = cpu_to_le16(nl_day - day_n[month - 1] + 1 + (month << 5) + (year << 9)); | |
1272 | } |